baltimore hung on against cleveland. >> what do we complain about now? how bad the real refs are? >> thanks, dave. >> we'll be right back. >>> pretty amazing, the first of its kind discovery. >> they found new evidence of an ancient stream bed on the red planet. gravel was once transported by water. the researchers estimate the stream was moving about three feet per second with a depth somewhere between ankle and hip deep. >> discovering things all the time. >> you should start doing mars weather. >> oh, my gosh. >> the weather on mars changes, doesn't it? >> there's the picture we're referring to. >> can you do a seven-day for mars? >> why not? >> there's the stream bed. >> right here across the bay area, it's going to get hot, not quite like mars heat. it's going to go up to 100 degrees saturday and sunday inland. we'll get gradual cooling wednesday and thursday. and maybe some showers for friday. >> thanks for watching. we hope to see you tomorrow. >> announcer: it's "the tonight show with jay leno," featuring rickey minor and "the tonight show" band. tonight, jay welcomes -- f